Book/Report

FZJ-2018-03122

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Elektronische und magnetische Struktur von Eisen- und Kobalt- Schichten im Monolagenbereich mittels spinpolarisierter Photoemission mit Undulatorstrahlun

Heinen, W. (Corresponding author)FZJ*

1989
Kernforschungsanlage Jülich, Verlag Jülich

Please use a persistent id in citations: http://hdl.handle.net/2128/18632

Report No.: Juel-2283

Abstract: A complex multipol-magnet structure (undulator/wiggler) has been built d characterized as a new synchrotron radiation source for the electron storage ring BESSY in Berlin. Optimization of the magnet structure and a first optical characterization of the radiation properties of this novel light source including beamline have been presented. The photon flux reaches up to 10$^{14}$ photons per second and Ampere ring current over a spectral range from 20 to 500 eV with as well increasedbrightness and exceeds the radiation power of the BESSY dipol-magnets by approximately two orders of magnitude. As a second important result, the spin-split electronic band structure of a ferromagnetic monolayer of Fe and Co on Au(001) has been measured directly for the first time, using spin-, energy-, and angle-resolvedphotoemission spectroscopy. The spectra differ clearly from those of thicker layers because of a 3d-band narrowing and show no dispersion with k$_{\bot}$ in agreement with the two-dimensionality of monolayer films. In general agreement with theoretical predictions, a slight dispersion with k$_{\vert \vert}$ is observed, whereas the measured exchange splitting of 2.3 eV is about 0.6 eV smaller than predicted.

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Contributing Institute(s):

1. Publikationen vor 2000 (PRE-2000)

Research Program(s):

1. 899 - ohne Topic (POF3-899) (POF3-899)

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